West Virginia Plumbing Contractor Practice Exam
Free Practice Exam
Test your knowledge with 10 questions from our pool of 20 free questions.
- 10 questions per attempt
- 30 minute time limit
- Unlimited attempts
- A new mix each time
- Instant results
Full Practice Exam
Complete exam simulation matching the real Prov test format.
- 100 questions (same as real exam)
- 180 minute time limit
- 11 topic areas covered
- 525 questions in pool
- Detailed explanations
Texts preferred · 9am–9pm Central
West Virginia Plumbing Contractor Practice Exam Guide
What's on the exam
Questions per topic, out of 100This practice exam follows the official content outline for the West Virginia Plumbing Contractor exam: General Knowledge, Fixtures & Fittings, Storm Drainage, Fuel Gas Systems, Safety, Isometrics, Water Supply and Distribution, Water Heaters, Drain, Waste and Vent Systems, Plumbing Math, Plumbing Tools.
You can practice two ways. The free practice exam gives you 10 questions per attempt, and you can retake it whenever you like. The full practice exam gives you 100 questions on a 3 hours clock, with a new draw from our question bank each attempt.
General Knowledge 10 items
Our study plan for this topic: IPC definitions and plumbing code terminology; IPC scope, permit requirements, and inspection procedures; Types, properties, and applications of plastic pipe (ABS, PVC, CPVC, PEX, PE, PB); Plastic pipe sizing, labeling, schedules, and SDR ratings; Reading and interpreting construction drawings (floor plans, riser diagrams, isometric sketches, plumbing symbols); Model plumbing codes (the IPC): structure, purpose, and chapter organization; Code development, revision, and adoption process for model and local codes; Compressed-air system components, installation, and safety.
Fixtures & Fittings 6 items
Our study plan for this topic: Minimum number of required plumbing fixtures by occupancy classification; Fixture installation requirements and clearances; Faucets and fixture fittings including shower valves and temperature limiting devices; Backflow protection for plumbing fixtures and appliances; Fixture-specific standards and waste outlet requirements; Fixture materials and construction standards (vitreous china, porcelain enamel, cast iron, stainless steel, fiberglass/GRP, acrylic plastic); Water closet types, flushing mechanisms, and water conservation requirements; Urinal types, flushing devices, and substitution limits for water closets.
Storm Drainage 5 items
Our study plan for this topic: Rainfall rate determination using 100-year hourly data and NOAA maps; Sizing vertical conductors and leaders using code tables; Sizing horizontal storm drain piping by pipe diameter and slope; Roof drain flow rate and minimum number of drains per roof area; Secondary (emergency) roof drains and scuppers — requirements and sizing; Siphonic roof drainage systems — design standards and installation requirements; Storm drainage pipe materials for above-ground conductors, underground drains, and storm sewers; Traps, cleanouts, and backwater valves in storm drainage systems.
Fuel Gas Systems 10 items
Our study plan for this topic: Gas Appliances; Gas Piping; Gas piping materials and fittings (metallic pipe, copper tubing, CSST, polyethylene plastic); Pipe sizing methods (longest length, branch length, hybrid pressure); Pressure testing and leak checks of gas piping systems; Combustion air requirements for gas appliances (indoor, outdoor, and combination methods); Venting systems for gas appliances (vent types, connectors, termination, sizing); Appliance location, clearances, and installation requirements.
Safety 7 items
Our study plan for this topic: Personal protective equipment (PPE) selection, inspection, and proper use; Hazard Communication (HazCom) standard, safety data sheets (SDS), and chemical labels; Work zone safety: signs, signals, barricades, and walking/working surfaces; Hand tool safety: bladed and impact tools; Power tool safety: electrically powered and liquid-fuel tools; Trenching and excavation safety: hazards, protective systems, and OSHA requirements; Confined space classification, entry permits, and atmospheric hazards; Lockout/tagout procedures and emergency response planning.
Isometrics 13 items
Our study plan for this topic: Center-to-center and end-to-end pipe length calculations; Fitting allowances for threaded, copper, PVC, and welded fittings; 45-degree offset calculations using diagonal and rise/run constants; Offset calculations for other fitting angles (60°, 22½°, 11¼°, 72°) using trigonometric constants; Three-pipe diagonal assembly layout and pipe length determination; Rolling offsets and true offset calculations; Parallel offset spacing and equal spacing calculations; Reading and applying pipe fitting data tables from appendix references.
Water Supply and Distribution 14 items
Our study plan for this topic: Potable water protection and cross-connection control; Backflow prevention devices and assemblies; Pipe materials, fittings, and joining methods for water service and distribution; Water pressure requirements, pressure-reducing valves, and booster systems; Hot water supply system requirements and thermal expansion control; Water piping system sizing using fixture units and segmented loss method; Water heater installation, safety devices, and relief valve discharge piping; Water volume, pressure, and capacity calculations.
Water Heaters 7 items
Our study plan for this topic: Water Heaters; Safety devices for water heaters including relief valves and discharge piping; Water heater installation requirements including access, location, and connections; Hot water supply system requirements including temperature limits and recirculation; Types of water heaters including gas, electric, tankless, heat pump, and indirect; Water heater selection criteria including capacity, fuel type, recovery rate, and durability; Thermal expansion protection including expansion tanks and closed systems; Gas water heater venting requirements and flue installation.
Drain, Waste and Vent Systems 14 items
Our study plan for this topic: Indirect Waste; Special Waste; Drainage fixture unit (DFU) values and system sizing; Horizontal drainage pipe slope and installation requirements; Cleanout placement, sizing, and access requirements; Trap requirements, prohibited trap types, and trap seal protection; Vent types, sizing, and terminal requirements; Grease interceptors and other interceptors and separators.
Plumbing Math 9 items
Our study plan for this topic: Arithmetic operations and formula solving for plumbing applications; Unit conversions and measurement systems (English and metric); Geometric shapes, area, and volume calculations; Pythagorean theorem and right triangle solutions; Pipe offset, diagonal, rise, and run calculations using angle constants; Water pressure, head, and force calculations; Pipe capacity, weight of water, and volume-to-gallon conversions for cylindrical and rectangular containers; Ratio of pipe capacities and pipe sizing using units of flow.
Plumbing Tools 5 items
Our study plan for this topic: Hand tool safety and proper work habits; Measuring and layout tools (folding rules, tape measures, squares); Leveling tools (spirit levels, torpedo levels, laser levels, plumb bobs, chalklines); Hand cutting tools (hacksaws, chisels, manual pipe cutters, shovels); Pipe holding and assembly tools (wrenches, pliers, vises, ratchet threaders); Hammers and screwdrivers used in plumbing; Power tool safety (GFCI protection, extension cord ratings, grounding); Power cutting and drilling tools (reciprocating saws, band saws, abrasive saws, drills, drill bits).
Sample 1 — Water Supply and Distribution
Question: During trim-out of a tank-type water closet, your helper has set the float-controlled valve, connected the riser, and turned on the water. The water level is too high, so he starts to bend the float arm to lower it. You stop him and direct him to use the adjusting screw instead. Why?
- A. The rod may rotate a half-turn and overflow the tank
- B. The rod may hold the flush valve off its seat
- C. The rod may weaken and snap after repeated use
- D. The rod may rub the tank and wear through it
Correct Answer: A
Per Plumbing Basics for Contractors, Section 3.4.0 (Servicing Float-Controlled Valves), Step 7 directs the installer to adjust the float ball with the adjusting screw and specifically warns not to bend the float arm, because the rod may work around a half-turn (180 degrees) and cause the tank to overflow.
Reference: Plumbing Basics for Contractors, Chapter 11 — Types of Valves, Section 3.4.0 Servicing Float-Controlled Valves, Page 496
Sample 2 — Drain, Waste and Vent Systems
Question: A circuit-vented horizontal branch in a multistory building serves six water closets and connects to a drainage stack that receives discharge from upper horizontal branches. The required relief vent is being taken off a fixture branch within the same branch interval. What is the maximum drainage fixture unit discharge permitted to that relief vent?
- A. 8 dfu
- B. 4 dfu
- C. 2 dfu
- D. 6 dfu
Correct Answer: B
Per IPC 914.4, a relief vent is required for circuit-vented horizontal branches receiving four or more water closets and connecting to a stack receiving discharge from upper branches. IPC 914.4.2 permits the relief vent to be a fixture drain or fixture branch within the same branch interval, but limits the maximum discharge to that relief vent to four fixture units.
Reference: IPC 2018 Chapter 9 Vents — Sections 914.4 and 914.4.2
Sample 3 — Isometrics
Question: On a high-rise remodel you plan to vent the fixtures on one horizontal branch drain with branch-type air admittance valves. That horizontal branch is located six branch intervals below the top of the drainage stack. In addition to the air admittance valves, what does the code require for that horizontal branch?
- A. A yoke vent at the next lower branch
- B. A relief vent to a vent stack
- C. An individual vent for each fixture
- D. A stack-type air admittance valve
Correct Answer: B
Per IPC 918.3.1, where the horizontal branch served by individual or branch-type air admittance valves is located more than four branch intervals from the top of the stack, the branch must be provided with a relief vent connecting to a vent stack or stack vent, or extending outdoors. The relief vent connects between the stack and the most downstream fixture drain and is sized per Section 906.2.
Reference: IPC 2018 Chapter 9 Vents, Section 918.3.1
Your first attempt tells you where you're starting from. After every attempt, the results page shows your score for each outline topic, so you can see what to study next. Compare your score with the real exam's passing score, 70% correct, and keep going until you pass consistently.
- Answer the questions you know first, and bookmark the rest. Our practice exams let you bookmark and come back.
- Return to your bookmarks on the second pass.
- Keep a steady pace. The real exam works out to about 1 minute 48 seconds per question.
- After each attempt, look up each missed question's reference and read the section.
| Questions | 100 questions |
| Time limit | 3 hours |
| Passing score | 70% correct |
| Books in the exam room | Open book |
| Exam fee | $59 |
- Your exam is graded immediately upon completion and results are automatically forwarded to your licensing authority.
- There is no limit on Plumbing exam attempts and no waiting period between attempts.
Source: Contractor Licensing Board — Candidate Information Bulletin, WV CIB 2026.10.27 (Version 1.0, effective October 27, 2026). Check the bulletin before test day: fees and rules can change.